Water-purifier for loco motive-boilers



(No Model.)

J. B. BARNES. WATER PURIPIER FOR LOOOMOTIVE BOILERS.

No. 435,168. Patented Aug. 26, 1890.

Fig.3.

matter as it falls to the bottom of the waist or mentary matter in the waist of the boiler,

fire-box at its full height; also, to provide UNITED STATES PATENT OFFICE.

JOSHUA B. BARNES, OF SPRINGFIELD, ILLINOIS.

WATER-PURIFIER FOR LOCOMOTIVE-BOILERS.

SPECIFICATION forming part of Letters Patent No. 435,168, dated August 26, 1890.

Application filed July 11, 1890- To all whom, it may concern.-

Be it known that I, JOSHUA B. BARNES, of Springfield, in the county of Sangamon and State of Illinois, have invented a new and Improved IVater -Purifier for Locomotive- Boilers; and I do hereby declare that the following is a full and exact description of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

My invention relates to an improvement in water-purifiers for locomotive-boilers.

My object is to free the water from its impurities after it enters the boiler by the heat thereof, but before it comes in contact with the fines, or with any part of the boiler that is exposed directly to the fire, and also to provide means for keeping the sedimentary cylindrical part of the boiler in such commotion as to prevent its hardening into scale; and, further, to provide means for blowing out under a full head of steam all the sediand still retain the water which is in contact with the flues and crown-sheet of the means for washing out the boiler when cold without emptying it.

The details of the device by which I accomplish these ends are fully explained in the following specification and illustrated in the accompanying drawings, in which Figure 1 is a lateral view of the cylindrical part of a locomotive-boiler provided with my device, and taken in the line of its axis. Fig. 2 is a plan view of a portion of the bottom of the cylindrical part of the boiler, and Fig. 3 is a transverse sectional view of the cylindrical part of the boiler, taken in the linew 00, Fig. 1.

Referring to the drawings, A represents the shell of the cylindrical part or waist of the boiler; B, an inner shell secured at the required distance within the outer shell by segmental rings 1) Z) I)", as shown in Fig. 1, said segmental rings and the inner shell B being secured to the outer shell of the boiler by rivets or other suitable means and calked so as to form an annular water-tight space S between the inner and outer shell, extending upward to a height about three or four Serial No. 358,459. (No model.)

inches or more above the crown-sheet of the fire-box, and nearly the entire length of the Waist or cylindrical part of the boiler, as shown in Fig. 1..

To give better support to the lower part of the inner shell, an oblong frame F, preferabl y made of common angle-iron, a plan or top View of which is given in Fig. 2, is secured to the under side of the shell B, and adapted to rest on the bottom of the waist of the boiler, as shown in Figs. 1 and 3. Said supportingframe, it will be observed, is pierced at intervals along the lower part of the sides and ends with semicircular openings 0*, the use of which will appear when the operation of the device is explained.

, c c are feed-water check-valves in the forward end of the waist of the boiler, as shown in Fig. 1.

For the purpose of forcing the water to flow downward soon after entering the annular space or chamber S the forward part of the latter is partitioned off by two segments 1) b of a ring, said segments filling the annular space S downward as far as the flange of the frame F, and upward as far as the curved upper edge of the inner shell B, as shown in Fig. 3. The forward part of the space S thus partitioned off is closed at the top by a bar 19, riveted to both the inner and outer shell, and is provided with a small steamvent q.

Between the lower ends of the segments 1) b and the vertical sides of ,the frame F are openings g g, (see Fig. 3,) which are the only channels of communication between the two compartments into which the feed water heater S is divided.

In the bottom of the waist of the boiler, and located between the sides of the frame F, is an opening 0, closed by any suitable form of mud-valve, hand-holes closed'by the ordinary means being provided, as shown at 2' 1 Fig. 2, or-located as most convenient.

The several parts of my device being constructed and connected with the boiler, as above described, its operation is as follows: The boiler being full and steam up, the feedwater is admitted to the annular chamber S by the injection check-valves c c, in the ordinary manner; but instead of flowing directly into the main body of the boiler and mixing with the water which is in contact with. the

parts of the boiler that are in direct contact with the fire, it can only enter the body or main part of the boiler over the upper curved edges (Z of the inner shell B. The greater part of the heat imparted to the feed-water is therefore received by the latter at the top of the chamber S, the effect of which is to drive the sedimentary matter with which the Water is charged toward the lower and consequently cooler part of the chamber S, where the water deposits the greater part of its impurities. The curved edges 01 d of the shell B are for the purpose of arresting the flow of such solid matter as would without them find its way into the main part of the boiler. The large area of the comparatively thin layer of feed-water, including, as it does, nearly three-fourths of the circumferential extent of the main body of steam-generating water in the boiler, causes it to rapidly reach a temperature at which it freely and quickly deposits its impurities, so that but a very small quantity, if any, of the latter can get beyond the chamber S, from which it can be so easily blown out under a heavy head of steam that the formation of scale could only take place through neglect to blow out sufficiently often.

It will be noticed that by means of my device all the water contained in the heater S may be blown out without loweringthe water covering the flues and fire-box below the upper'curved edges d d of the inner shell 13. In regard to the forward part of the heater S, which is partitioned off from the main part and provided with two openings 9 g for communication with the said main part, the effect of this chamber is to force the inflowing feed-Water down to the bottom of the waist of the boiler before it flows over the curved edges of the heater, thus increasing the circulation of the feed-water by which the precipitation of its solid contents is hastened. The purpose of the semicircular openings rin the sides and ends of the frame F is to cause currents and counter-currents in the bottom of the waist of the boiler when the mud-valve tire length thereof is thus offered for its escape. It will also be observed that the space S may be emptied, the hand-holes opened, and every part washed out with the hose in the usual way without emptying the boiler, thus effecting a considerable saving of water.

It is obviousthat numerous changes in the construction and arrangement of the minor details of my device might be resorted. to without departing from the spirit of my invention, and such changes may be necessary to adapt it to different forms of boilers. I would therefore have it understood that I do not limit myself to the exact construction of parts shown and described, but consider my self at liberty to make'such changes as come within the spirit and scope of my invention.

What I claim as new, and desirevto secure by Letters Patent, .is-

1. In a locomotive-boiler, the combination,

with the outer shell of the cylindricalpart thereof, of an inner-shell concentrically secured in position within the outer one, ex-, tending upward on each side a little above the normal Water-line and made water-tight at each end, so as to form an annular feedwater heater having communication with the main part of the interior of the boiler only over the upper edges of said inner shell, substantially as and for the purpose herein set forth.

- 2. In a locomotive-boiler having in combination with the waist or cylindrical part thereof an inner shell concentrically secured within the outer one, as described, a supportingframe provided with openings 1" a", &c., and

having an opening in the shell of the boiler for an outlet-valve near the central part of said supporting-frame, all constructed and adapted to operate substantially as and for the purpose set forth.

3. In a locomotive-boiler having in combination with the waist or cylindrical part thereof an inner shell concentrically secured to the outer one, as described, the bar p, provided with a small outlet-opening q, and segmental partition-bars b b, all constructed and adapted to operate substantially as and forthe purpose set forth.

In testimony that I claim the foregoing I JOSHUA B. BARNES.

Witnesses:

W. J EFFERY, J. O. BABOOCK. 

